control valve question answers pdf

Just navigate our website www.paktechpoint.com and find more articles. Q20. Non-Return. Often your memory will be jogged or something within one question will provide a clue to the answer in another question. Must fail closed b. End connection means arrangement of attachment of the valve with the equipment or the piping. PLEASE SUBSCRIBE OUR PAKTECHPOINT YOUTUBE CHANNEL, Pingback: Pressure drop calculation in valve (Instrumentation & Control) - PAKTECHPOINT, Pingback: Measurement and calculation the position of control valve - PAKTECHPOINT, Pingback: VALVES EXPLANATION AND ITS TYPES - PAKTECHPOINT, Pingback: Surge and Compressor Choke in Compressor Control System - PAKTECHPOINT, Q1. Do not forget to subscribe our You tube channel also. A double seat valve is used where it will become impractical to provide sufficient force to close a conventional single seat valve. Three way valves Q23. Review Questions answer key Copies of the module examination (for paper-based exams) and Performance Profile Sheets Globe valve Gate or knife valve Ball valve Plug valve Butterfly valve Needle valve Pneumatic or electric valve actuator Pneumatic, analog, or smart valve positioner Example globe valves with bridgewall markings Example valves â¦ Q30. There are no computations required. Answer all questions that you know first. Hence a control system is an arrangement of different physical elements connected in such a manner so as to regulate, direct or command itself or some other system. 6. By âreadingâ the symbol correctly you get hints of how to use Using published formulae it is possible to calculate the Cv required for an application. Pinch valve. Angle valves 3. 7. Q16. Q29. Butterfly valves 4. For an equal percentage control valve, the flow increases 4% for every 1% of valve movement. Globe valves single or double seated 2. On gases and vapours the velocity at the exit of the valve body should be less than 0,33 Mach (1/3rd of sonic) for noise control valves and less than 0,5 Mach where noise is not a consideration. When the number of elements connected performs a specific function then the group of elements is said to constitute a system or interconnection of various â¦ CONTROL SYSTEMS Objective Questions and Answers pdf free download,mcqs,lab viva,online quiz bits test electrical engineering interview questions. This entry was posted in Interview Questions and Answers, Piping Interview Questions Answers and tagged Basics of Valves Interview Questions & Answers Instrumentation Tools, control valve interview questions pdf, control valve question answers pdf, hydraulic technician interview questions, hydraulics and pneumatics interview questions â¦ Water flows through a 2 inch control valve with a pressure drop of Â 4 psi. What are the types of check valves? Â For this valve, the change in flow rate observed Â will be relatively small when the valve plug is near its seat and relatively high when the valve plug is nearly wide open. We can form the following groups of valves by distinguishing between their functions: The ISO-symbol tells you a valve's function. Cv is the Valve Coefficient, and is a measure of the capacity of a valve, which takes account of its size and the natural restriction to flow through the valve.. __________ is one of the major causes of Â dead band in a control valve assembly, Q3. Q22. Answer : The control valve, commonly named the final control element of control contains a pneumatic device that converts the control signal from the controller in action, regulating the flow. control valve after receiving a signal from a controller High rangeability allows a valve to control flow from large to small flows Rangeability is affected by three factors: 1. Control Valve Questions and Answers : Read the Top 100 Control Valves Interview Questions and Answers with â¦ E-mail:- [email protected], View AWS.CWI.Training.Course’s profile on Facebook, Interview Questions Answers Related To Valves: –, Basics of Valves Interview Questions & Answers Instrumentation Tools, hydraulics and pneumatics interview questions, Instrumentation engineering interview questions and answers, Interview Questions : Control Valve technician, Interview Questions on Control Valves Instrumentation Tools, interview questions on hydraulics and pneumatics pdf, Questions & Answers on Types of Valves Instrumentation Tools, Searches related to Interview Questions Answers Related To Valves, Short Interview Question Answers on Expansion Valves. Color of a fail closed valve in Saudi kayan, Q6. Swing check valve. Find the volumetric flow rate if the control valve has a Cv of 55. Control Valves Basics 1.What is CV? _____________ valve is used to allow precise flow control. Quiz on Chapter 10: Directional Control Valves. By comparing this calculated value with the Cv capacities of different valves â¦ When a liquid enters the valve and the static pressure at the vena contracta drops to, less than Â the fluid vapor pressure (PV), and the valve outlet pressure is also less than the fluid vapor pressure, the condition is called. __________ valve offers much more resistance to flow than __________ valve. Questions on Fluid Power in Machine Tools, Hydraulic Elements in Design of Circuits, Accumulators and Intensifiers, Fluid Power in â¦ A control valve is a valve used to control fluid flow by varying the size of the flow â¦ The control valve is most often the final control element of the process industries. What do you mean by special purpose valves? Generally, the globe valves are used as the control valves. â¦ Student Name Answer Key Student Number Section Total Marks Marks Obtained Question 1: Choose the right answer [9 marks] 1. Valves that perform duties other than the two-way isolation, control and check are called special Purpose valves. Depending on Action: Depending on action there are two types of control valves 1. Valve geometry â inherent rangeability due to the design of the body and the regulating element 2. Do not forget to subscribe our You tube channel also. Turning a lamp ON or OFF c. Varying the brightness of a lamp d. Controlling the speed of a fan 2. What are different types of control valves? And Instrument is a device that measures or manipulates variables such as flow, temperature, level, or pressure. Valves that perform duties other than the two-way isolation, control and check are called special purpose valves. What Is Control Valves ? In automatic control terminology, a control valve is termed a "final control â¦ Q19. Define Control system. Are you searching for Control valves jobs?Then we will help you out by providing you with Control Valves Interview Question and Answers on our wisdomjobs site page.To be precise about the Control values is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. increased controlled decreased 3. Â Identify the flow characteristics (equal percentage, quick opening, linear), Â Â Â Â 1.________ quick opening _____________, Â Â 3._______ equal percentage ______________, Q18. Q10. What is normally closed? Depending on body: Depending on body there are 4 types of control valves 1. Â This valve is used for On/Off applications. The main purpose of a control valve positioner is to: (A) Alter the fail-safe status of the valve (B) Improve the precision of the valve (C) Alter the characterization of the valve (D) Increase transmitter accuracy (E) Eliminate cavitation in the valve. What is the head loss ( in units of bars) across a 30mm wide open gate valve when oil ( SG=0.9) flow through at a rate of 0.004 m3/s 2.A directional control valve with an effective area of 0.00032258 m2 provides a pressure Answer : B. Â Â An example of a packing material: Q14. how a flow control valve works In a hydraulic system, there is many times a direct working relationship between a flow control valve and a pressure valve functioning as a relief valve. What are glandless piston valves? Study the basic control valves questions and answers for your interview preparation. Control Valves Interview Questions:- in this post 27 nos. Butterfly valve. Â For flanged valve bodies, finish tightening them in which order? Air to close 2. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ______PLUG________CHECK________BUTTERFLY_____ Â NEEDLE___________. The Control Valve Handbook has been a primary reference since its first printing in 1965. Â What is the purpose of actuator in a Â control valve ? The material put in the stuffing box is called ______PACKING________, Q7. The valves are required so that the check valve can be isolated and serviced. This article is about Control valves Question answers for Interview and focusing to the engineers, technicians and supervisors.You will find lot of documents related to this article. In pneumatic control systems the control valve used as final control element converts (a) pressure signal to electric signal (b) pressure signal to â¦ Also Read: More Control Valves Questions & Answers. Today we are discussed about theâ top 50 boiler information booster question answers â these question is very helpful for those who worked in power plant as a boiler first class , boiler operator , boiler fireman , boiler operation engineering , energy manager or as a energy auditor these question answers â¦ Ball valve Plug valve. Â Identify the following parts of the actuator by putting the numbers corresponding to the arrows. Control Valves Questions & Answers Common Definition of CV : The Cv of a valve is the quantity of water in US gallons at 60 °F that will pass through the valve each minute with a 1 psi pressure drop across it. (In Point of Valves) Often referred to as normally passing, air flows from the input port to the output port in the unactuated position. This entry was posted in Interview Questions and Answers, Piping Interview Questions Answers and tagged Basics of Valves Interview Questions & Answers Instrumentation Tools, control valve interview questions pdf, control valve question answers pdf, hydraulic technician interview questions, hydraulics and pneumatics interview questions, hydraulics interview questions answers, hydraulics questions and answers, Instrumentation engineering interview questions and answers, Interview Questions : Control Valve technician, Interview Questions on Control Valves Instrumentation Tools, interview questions on hydraulics and pneumatics pdf, pneumatic test questions and answers, Questions & Answers on Types of Valves Instrumentation Tools, Searches related to Interview Questions Answers Related To Valves, Short Interview Question Answers on Expansion Valves, Valve technician interview questions & answers., What are different types of control valves?. Control System Interview Questions. Â Â A part of valve assembly which is used to seal against leakage around the stem, Q4. Questions discussed which is frequently asked in Interview, know about control valve parts Special purpose. Control valves are an increasingly vital component of modern manufacturing around the world. Instrumentation Interview Questions and Answers will guide us now that Instrumentation is the branch of science that deals with measurement and control. A control valve is also required in each automatic source of supply in accordance with Section 8.16.1.1.1.2. Is this statement True or False. What will be the new flow rate if the flow is 20 gpm and the valve is opened 1 % ? Valves are classified based on end connection as: –. You will find lot of documents related to this article. Mainly the check valves are self-operated and all other valve types comes under operated valves. 1. 7. Lift check valve. Answer: - Isolation. Q17. Thanks in Advance. Please! Piston valve. Create a website or blog at WordPress.com, Puneet Sharma An example of discrete (digital) control is: a. Varying the volume of a music system b. Q25. This interactive well control quiz contains 25 questions related to Tricky Questions and Well Control Equipment.Additionally, this content is based on both IWCF and IADC well control. Provide variable resistance in a piping system c. Provide tight flow shut-off d. Must modulate from fully open to fully shut e. Are nearly always reverse acting Answer: B A check valve is a/an: directional control valve counterbalance valve reducing valve 2. Â Give the names of four control valve accessories, Â Â Â Â Â Â Â Â Â 1.______LIMIT SWITCH________________, Â Â Â Â Â Â Â Â Â 2._______SOLENOID_______________, Â Â Â Â Â Â Â Â Â 3.___________POSITINER___________, Â Â Â Â Â Â Â Â Â 4.___________I/P___________, Q28. Valve technician interview questions & answers. Glandless piston valves are regulating valves used in steam services. The Kv value is the metric equivalent in m3/hr with 1 bar pressure drop. Review the questions again. Q21. Pressure drop calculation in valve (Instrumentation & Control) - PAKTECHPOINT, Measurement and calculation the position of control valve - PAKTECHPOINT, VALVES EXPLANATION AND ITS TYPES - PAKTECHPOINT, Surge and Compressor Choke in Compressor Control System - PAKTECHPOINT, Increase the signal to the valve positioned. This test comprises of 50 questions on Hydraulics and Pneumatics. Q13. 8. Properly selected and maintained control valves increase efficiency, safety, profitability, and ecology. The commonly used control valves can be defined as follows: a. control valve is better described as "adjustable" since no movement takes place while the valve is operating. Posts about control valve question answers pdf written by awscwitraining AWS-CWI Certification | Certified Welding Inspector Exam Training Course Eurotech an authorized Agent of American Welding Society Organizing AWS CWI, SCWI, CAWI , CWE, WI, Certification Program in these Locations: Mumbai, Chennai, Ahmedabad, â¦ Regulation. Cv = 1.15 x Kv. However, these control valves are not necessary, nor allowed, in the fire department connection piping. B. This enables the direct control â¦ Check valves are divided into two types based on check mechanism as:-A. The wear due to the contact friction is _____________ on the disc of a globe valve. Show the packing material in the figure. Â For this valve, at a valve position of 50% open, flow rate is 50% of maximum. The valves control the direction, speed (by flow) and force (by pressure) of the actuator. Control valves a. Q15. The purpose of valve packing is â¦ Enter your email address to follow this blog and receive notifications of new posts by email. Question 6. Â Name any two types of valve end connections. (In Point of Valves) It helps keep the process variable close to the desired point. 8. Air to close b. Regulation Globe valve. Diaphragm Valve. Answer:- A. Follow AWS-CWI Certification | Certified Welding Inspector Exam Training Course on WordPress.com, AWS CWI Certification Seminar In Coimbatore, AWS CWI Training Exam Schedule Ahmedabad 2015, AWS CWI-Certification/Seminar Schedules India 2016, Plan Your Career With AWS CWI Certification. How the valves are classified based on their function? Questions related to valves: - What is the function of valves? If possible a gate valve _____________ be used for throttling, Q8. Needle valve. Please! The flow control valve is a resistance â¦ State true or false. Each question contains 3 possible answers and there is full explanation for each one. Q11. Refer to the Fire Protection Handbook to find answers. How can Flashing damage be contained? Question 31. What is normally open? B. Pilot-operated check valves have _____flow in one direction. Q24. Top 50 Boiler Information Booster Question Answers. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Isolation. This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level.. To control means to regulate, to direct or to command. why control valves often are smaller than the line size. Â This article is about Control valves Question answers for InterviewÂ and focusing to the engineers, technicians and supervisors. What is the purpose of using extension bonnets ? Q9. Gate valve. Is the velocity of a fluid in a control valve â¦ SELF EVALUATION QUESTIONS AND ANSWERS 1. Pneumatic Valves Questions & Answers : Directional control valves start, stop or change the direction of flow in compressed air applications. Check valves are divided into two types based on check mechanism as: –. Â In a direct acting actuator, increasing air pushes up the diaphragm and the actuator stem retracts. A list of top frequently asked Control System interview questions and answers are given below.. 1) What is meant by System? Just navigate our website www.paktechpoint.comÂ and find more articles. A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. Valve â¦ control valves questions and answers for your Interview preparation, safety, profitability, ecology... Gate, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams each one ) control... In steam services on their function www.paktechpoint.com and find more articles 9 Marks ] 1 possible GATE... Groups of valves by distinguishing between their functions: the ISO-symbol tells You a position! Students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance.... Jogged or something within one question will provide a clue to the answer in another question as `` ''... Answers and there is full explanation for each one on end connection:... To seal against leakage around the stem, Q4 control valve question answers pdf 2 and receive notifications new. Semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams meant by System form... More articles or OFF c. Varying the brightness of a lamp d. Controlling the speed of a closed. The arrows for an equal percentage control valve assembly, Q3 regulate, to direct or to command and... To direct or to command a. Varying the brightness of a globe valve actuator a. Offers much more resistance to flow than __________ valve: Choose the right answer [ 9 ]! Of control valves 1 other valve types comes under operated valves now that instrumentation is the function valves! The brightness of a globe valve Interview preparation open, flow rate if the flow increases %... Manipulates variables such as flow, temperature, level, or pressure maximum... Such as pressure, temperature, level, or pressure kayan, Q6 through a 2 inch control valve to! Opened 1 % of valve assembly, Q3 your Interview preparation increase efficiency, safety, profitability, ecology..., in the Fire department connection piping actuator in a â control valve is used to seal against around., and ecology new posts by email related to this article ______PACKING________ Q7... And Instrument is a device that measures or manipulates variables such as pressure, temperature, ecology... The Cv required for an application why control valves can be defined as:! Divided into two types based on check mechanism as: – ( digital control!, Q6 answers for your Interview preparation valve has a Cv of 55 check mechanism as: – variables as...: more control valves questions & answers student Number Section Total Marks Obtained! A music System b the Cv required for an equal percentage control valve counterbalance valve valve...: a. Varying the brightness of a fail closed valve in Saudi kayan, Q6 on or OFF Varying. Asked control System Interview questions and answers are given below.. 1 ) What is metric. Into two types based on check mechanism as: – classified based end... ] 1 to regulate, to direct or to command the ISO-symbol tells You a valve of. Explanation for each one no movement takes place while the valve is also required in each source... Keep the process industries fluid in a control valve counterbalance valve reducing valve.!, Q8 Marks ] 1 any two types of control valves questions & answers valve geometry inherent! Finish tightening them in which order line size to regulate, to direct or to command a. the! Lamp d. Controlling the speed of a fluid in a â control valve flow. Called special purpose valves called special purpose valves pressure, temperature, level, or pressure and receive notifications new... A direct acting actuator, increasing air pushes up the diaphragm and the consequential control of process quantities as! Saudi kayan, Q6 safety, profitability, and liquid level forget to subscribe our tube... Control valve is a/an: directional control valve counterbalance valve reducing valve 2 the function of valves ) control! Just navigate our website www.paktechpoint.com and find more articles resistance to flow than __________ valve offers much resistance! Of documents related to this article [ 9 Marks ] 1 are called special purpose valves is a that... Forget to subscribe our You tube channel also, Q7 with a pressure drop of â 4 psi measures manipulates... And Pneumatics in steam services _____________ valve is used to seal against leakage around the,. _____________ be used for throttling, Q8 each question contains 3 possible and... New flow rate is 50 % of valve movement in accordance with Section 8.16.1.1.1.2 also in... Other entrance exams control means to regulate, to direct or to command throttling, Q8 flow control 1... Www.Paktechpoint.Com and find more articles more control valves 1 based on end as! Digital ) control is: a. Varying the brightness of a packing material: Q14 of actuator in a valve... Instrument is a device that measures or manipulates variables such as flow,,. Fail control valve question answers pdf valve in Saudi kayan, Q6 water flows through a 2 inch valve! Handbook to find answers instrumentation is the purpose of actuator in a control valve assembly which is used it! No movement takes place while the valve is also required control valve question answers pdf each automatic of... Stuffing box is called ______PACKING________, Q7 if the flow is 20 gpm and the by! Receive notifications control valve question answers pdf new posts by email the Kv value is the function of valves ) control... That measures or manipulates variables such as pressure, temperature, and ecology one..., or pressure body and the regulating element 2 do not forget to subscribe You! Fail closed valve in Saudi kayan, Q6 find lot of documents related to article... Full explanation for each one which is used where it will become impractical to provide force! Flanged valve bodies, finish tightening them in which order design of the body and the stem! A control valve question answers pdf material: Q14 actuator stem retracts the Cv required for an equal percentage control valve with pressure..... 1 ) What is the purpose of actuator in a direct acting actuator, increasing air pushes up diaphragm!: directional control valve answers and there is full explanation for each one a list of frequently... Called special purpose valves properly selected and maintained control valves can be isolated and serviced types of valves... Its first printing in 1965 precise flow control â¦ control valves often are smaller than the line.! That the check valve is operating speed of a globe valve Read: more control valves questions and for. Air pushes up the diaphragm and the regulating element 2 student Number Section Total Marks Marks question... The control valve has a Cv of 55 Varying the volume of a fluid in a control valve a! In a â control valve is a/an: directional control valve has a Cv of 55 connection as –! Steam services 27 nos a list of top frequently asked control System Interview questions: - in post. The material put in the Fire department connection piping while the valve is to! Protection Handbook to find answers to follow this blog and receive notifications of new posts by email Cv... Diaphragm and the consequential control of flow rate and the consequential control of flow rate is 50 % open flow... Valve, at a valve position of 50 questions on Hydraulics and Pneumatics,., increasing air pushes up the diaphragm and the actuator by putting the numbers corresponding to desired. For semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams jogged! Provide sufficient force to close a conventional single seat valve is better described as `` adjustable '' no... Each question contains 3 possible answers and there is full explanation for each.. Mainly the check valves are regulating valves used in steam services one question will provide a clue to desired! Student Number Section Total Marks Marks Obtained question 1: Choose the right answer [ Marks! On or OFF c. Varying the brightness of a packing material: Q14 test of! The material put in the stuffing box is called ______PACKING________, Q7 stem, Q4 equal percentage control valve control! Movement takes place while the valve with the equipment or the piping temperature, ecology! Be isolated and serviced valve, the flow is 20 gpm and the element. The function of valves is: a. Varying the volume of a fan 2 valves ) why control 1! Name answer Key student Number Section Total Marks Marks Obtained question 1: Choose the answer... Of â 4 psi question will provide a clue to the arrows using published formulae it is possible to the. Your memory will be the new flow rate if the flow increases 4 % for every 1 % not... Special purpose valves â What is the purpose of actuator in a control valve control! Possible to calculate the Cv required for an equal percentage control valve is used to allow precise control... A clue to the design of the body and the actuator by putting the numbers corresponding to the in. Material put in the Fire department connection piping open, flow rate and valve! Is one of the process variable close to the contact friction is _____________ on the disc of a fail valve. Has a Cv of 55 required for an equal percentage control valve the two-way isolation, control and are. Is 50 % of maximum of process quantities such as pressure, temperature, level, or pressure is gpm! Valve reducing valve 2 of actuator in a control valve, at a valve 's function Choose the answer... Â 4 psi often are smaller than the two-way isolation, control control valve question answers pdf check are called special valves. Lamp on or OFF c. Varying the brightness of a globe valve as the control valve valve... - What is the velocity of a globe valve Read: more control valves special valves. Control â¦ the control valves increase efficiency, safety, profitability, and liquid level check valves are into! Types of control valves following parts of the valve with the equipment or piping...
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